import java.util.HashMap;
import java.util.Map;

/**
 * @Author: WangYongGan
 * @Date: 2021/12/2 1:29
 * @Description:
 */
public class map {
    public static void main(String[] args) {
        Map<String,Object> map=new HashMap<>();
        map.put("a",1);
    }
}
